cashapelayer

is there a nice way to calculate the position of a path (CGPath or UIBezierPath) at a given time (from 0 to 1)? Using CAShapeLayer for example, one can create an animated stroke end. I want to know the position of that stroke end at arbitrary times. Thanks in advance, Adrian You can definitely base your approach on the CADisplayLink and a tracking layer. However, if you don't mind doing a little bit of math on your own, the solution is not too complicated. Plus, you wont have to depend on setting up a display link and extra layers. In fact, you dont even have to depend on QuartzCore. The

I need to create a UIView that has the left border inclined with 45 degrees I was wondering，is there a way to acheive this programmatically? Does CATransform3D help me in this case since it’s not really a “3D rotation”? Edit Here's an image explaining more my needed output Fogmeister If you just want the shape with no content then you can create a CAShapeLayer and add it to your view's layer. (In fact you can also put content in there using this method but you'll need to alter it a bit). CAShapeLayer *layer = [CAShapeLayer layer]; UIBezierPath *path = [UIBezierPath bezierPath]; [path

I have used CAShape Layer before doing basic transformation on paths - from a smaller circle into a larger circle. Good enough, but then I tried to transform a triangle into a circle; it worked, but the transformation is weird. Other words, from one shape to another, it "flips", "twists" before the final shape is formed. With the same shapes, there is no problem - from a circle to a circle - but with different shapes, the transformation is weird. I wonder if this is the expected way? Or is there other tricks or workarounds where we can smoothly and proportionally transform one shape into

I am trying to animate the mask layer on a UIView. Basically this code displays the image below: let bounds: CGRect = self.manualWBMaskView!.bounds let maskLayer: CAShapeLayer = CAShapeLayer() maskLayer.frame = bounds maskLayer.fillColor = UIColor.blackColor().CGColor let screenWith : CGFloat = UIScreen.mainScreen().bounds.width let roundedRectFrame : CGRect = CGRectMake(self.manualWBMaskView!.bounds.midX - (screenWith/4), self.manualWBMaskView!.bounds.midY - (screenWith/4), screenWith/2, screenWith/2) let path: UIBezierPath = UIBezierPath(roundedRect:roundedRectFrame, cornerRadius:10 ) path

I want to simulate eraser effect with touch event to show a image that behind something block on top, eg, gray color; Something like that: I have find for a long time for the solution but I can't do it well. following is my custom view code: CustomView.m: -(id)initWithCoder:(NSCoder *)aDecoder { if (self = [super initWithCoder:aDecoder]) { [self setup]; } return self; } -(id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { [self setup]; } return self; } -(void)setup { [self setMultipleTouchEnabled:NO]; [self setBackgroundColor:[UIColor darkGrayColor]]; self

I am working on CAShapeLayer .And trying to draw non-linear path.I want to set frame to CAShapeLayer .So i can use CGPathGetPathBoundingBox method to get frame from CGPathRef . Here is code : CGMutablePathRef path = CGPathCreateMutable(); CGPathAddArc(path, NULL, rect.size.width/2, rect.size.height/2, 100, (0), (M_PI_2), NO); CGPathAddArc(path, NULL, rect.size.width/2, rect.size.height/2, 100-50, (M_PI_2), (0), YES); CGPathCloseSubpath(path); CAShapeLayer* arcLayer = [[CAShapeLayer alloc]init]; arcLayer.path = path; arcLayer.frame = CGPathGetPathBoundingBox(path); arcLayer.bounds =

I have a UIImageView. Inside that I am drawing a line wit user touch event. Problem is that a line can be drawn anywhere in UIImageview , but I like to draw line with image pattern only. For example, look at this image. I need to draw line on image pattern only. This is my code: -(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; touchPoint = [touch locationInView:self.imgColor]; UIBezierPath *path = [UIBezierPath bezierPath]; [path moveToPoint:CGPointMake(touchPoint.x,touchPoint.y)]; [path addLineToPoint:CGPointMake